/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Gets a list of pins that should hidden for a given function in a given graph
static void GetHiddenPinsForFunction ( [UEdGraph](API\Runtime\Engine\EdGraph\UEdGraph) const * Graph, [UFunction](API\Runtime\CoreUObject\UObject\UFunction) const * Function, [TSet](API\Runtime\Core\Containers\TSet)< [FName](API\Runtime\Core\UObject\FName) > & HiddenPins, [TSet](API\Runtime\Core\Containers\TSet)< [FName](API\Runtime\Core\UObject\FName) > * OutInternalPins )